msm8916: cma: Drop secure memory buffers

seed does not support widevine level 1, nor wfd; drop these CMA
secure buffers to reclaim memory.

Change-Id: I5b3404a8433ee5ee8e5753b4f81b3aab7af1c03f
Signed-off-by: Ajay Dudani <adudani@google.com>

arch/arm/boot/dts/qcom/msm8916-ion.dtsi

@@ -26,14 +26,6 @@
 			qcom,ion-heap-type = "SYSTEM_CONTIG";
 		};
 
-		qcom,ion-heap@8 { /* CP_MM HEAP */
-			compatible = "qcom,msm-ion-reserve";
-			reg = <8>;
-			qcom,heap-align = <0x1000>;
-			linux,contiguous-region = <&secure_mem>;
-			qcom,ion-heap-type = "SECURE_DMA";
-		};
-
 		qcom,ion-heap@27 { /* QSEECOM HEAP */
 			compatible = "qcom,msm-ion-reserve";
 			reg = <27>;

arch/arm/boot/dts/qcom/msm8916-memory.dtsi

@@ -41,12 +41,6 @@
 			label = "peripheral_mem";
 		};
 
-		secure_mem: secure_region@0 {
-			linux,reserve-contiguous-region;
-			reg = <0 0 0 0x6D00000>;
-			label = "secure_mem";
-		};
-
 		venus_qseecom_mem: venus_qseecom_region@0 {
 			linux,reserve-contiguous-region;
 			linux,memory-limit = <0x90000000>;